(1) Sometimes the salad is kept in plastic bags where bugs incubate under artificial supermarket display lights.(2) Only if we notice that a bird is unable to incubate the egg is it then put in an incubator.(3) Only female hummingbirds are involved in parental care; they must incubate eggs, brood young hatchlings, and feed the chicks as nestlings and fledglings.(4) Both male and female kingfishers incubate the eggs, which take 2 to 4 weeks to hatch.(5) Females build the nest, incubate eggs, and brood nestlings, but both sexes choose the nest site and feed offspring.(6) Both male and female birds incubate the three to four eggs for about 21 days.(7) Shortly thereafter, the female travels over the ice to the open sea to feed, leaving the male to incubate the egg. About two months later she will return to feed and raise the newly-hatched chick.(8) It's just a low-level bug that takes two or three days to incubate and two or three days to get over it.(9) In monogamous species, both the male and female build the nest, incubate eggs, brood young and feed nestlings and fledglings.(10) When most birds incubate eggs, the females often produce high levels of prolactin, a hormone involved in parental behavior.(11) The Petri dishes with embryos were incubated at 30u00d4u00f6u00bcu00d4u00fbu00e6C in the dark.(12) The female builds the nest, incubates the eggs, and feeds the young on her own.(13) The so-called u251cu00f6u251cu00e7u251cu2510primary malesu251cu00f6u251cu00e7u251cu00fb can be produced at high frequency in the laboratory by incubating developing embryos at temperatures between 18u00d4u00f6u00bcu00d4u00fbu00e6 and 20u00d4u00f6u00bcu00d4u00fbu00e6.(14) This co-operative behaviour, in which one chicken incubates the eggs of others to whom she's probably related, has clear biological advantages.(15) The eggs are incubated and hatch inside the female's body.(16) The tubes were incubated at ambient temperature.
